| 14 May - 18 May | CX80 World Cup in MTB Orienteering and Apresport European MTB Orienteering Championships 2025 |  Lithuania | Europe | M | Regional Championships
World Cup
World Ranking Event | | |  |
| 15 May - 18 May | European Junior and Youth MTB Orienteering Championships 2025 | Lithuania | Europe | M | Regional Championships | | | |
| 17 May | Austria Cup & Austrian Championship Long Distance |  Austria | Europe | F | World Ranking Event | L | | |
| 17 May | FinTrailO 2025, PreO |  Finland | Europe | T | World Ranking Event | P | | |
| 18 May | FinTrailO 2025, TempO | Finland | Europe | T | World Ranking Event | T | | |
| 22 May - 27 May | World Masters Games 2025 |  Chinese Taipei | Asia | F | Partner Event | | | |
| 24 May | Baltic Orienteering Championships |  Latvia | Europe | F | World Ranking Event | L | | |
| 24 May | VM uttak mellom |  Norway | Europe | F | World Ranking Event | M | | |
| 25 May | Finnish Orienteering Championship, Middle distance | Finland | Europe | F | World Ranking Event | M | 15/5 | |
| 25 May | VM uttak lang | Norway | Europe | F | World Ranking Event | L | | |
| 29 May | Swedish League, #5, sprint (WRE) |  Sweden | Europe | F | World Ranking Event | S | | |
| 31 May | King's Birthday Day 1 |  New Zealand | Oceania | F | World Ranking Event | S | | |
| 31 May | Negeri Sembilan Forest Malaysia Orienteering Cup 2025 |  Malaysia | Asia | F | World Ranking Event | S | 28/5 | |
| 31 May | Hungarian Middle Distance Championships |  Hungary | Europe | F | World Ranking Event | M | 19/5 | |
| 31 May | Swedish League, #6, middle | Sweden | Europe | F | World Ranking Event | M | | |
| 31 May | Sprint Estonian championships |  Estonia | Europe | F | World Ranking Event | S | 26/5 | |
| 1 Jun | King's Birthday Day 2 | New Zealand | Oceania | F | World Ranking Event | M | | |
| 1 Jun | Czech Cup |  Czechia | Europe | F | World Ranking Event | L | 15/5 | |
| 1 Jun | Swedish League, #7, long | Sweden | Europe | F | World Ranking Event | L | | |
| 2 Jun | King's Birthday Day 3 | New Zealand | Oceania | F | World Ranking Event | L | | |
| 7 Jun | Falco Cup 2025 | Lithuania | Europe | T | World Ranking Event | T | 4/6 | |
| 8 Jun | Falco Cup 2025 | Lithuania | Europe | T | World Ranking Event | P | 4/6 | |
| 13 Jun | Trofeo Internacional Madrid Trail-O |  Spain | Europe | T | World Ranking Event | T | 6/6 | |
| 14 Jun | Trofeo Internacional Madrid Trail-O | Spain | Europe | T | World Ranking Event | P | 6/6 | |
| 15 Jun | Trofeo Internacional Madrid Trail-O | Spain | Europe | T | World Ranking Event | P | 6/6 | |
| 15 Jun | Alpe Adria Cup - 25th Zagreb Open Orienteering Event |  Croatia | Europe | F | World Ranking Event | L | 2/6 | |
| 17 Jun - 22 Jun | Orienteering World Cup Round 1 - Idre Fjäll | Sweden | Europe | F | World Cup
World Ranking Event | | | |
| 19 Jun | Mazovia MTBO’25 |  Poland | Europe | M | World Ranking Event | M | | |
